We claim the ornamental design for a cable rail system, as shown and described.
FIG. 1 is a perspective view of a cable rail system showing our design;
FIG. 2 is an end view thereof;
FIG. 3 is a bottom plan view thereof, with the top plan view being identical;
FIG. 4 is rear elevational view thereof; and,
FIG. 5 is a front elevational view thereof.
The broken lines shown in the Figures are included for the purpose of illustrating environmental features and form no part of the claimed design.
The claim is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.